diff --git a/pytchat/core_async/replaychat.py b/pytchat/core_async/replaychat.py
index ab5fd5b..45f0c6e 100644
--- a/pytchat/core_async/replaychat.py
+++ b/pytchat/core_async/replaychat.py
@@ -136,7 +136,7 @@ class ReplayChatAsync:
         """最初のcontinuationパラメータを取得し、
         _listenループのタスクを作成し開始する
         """
-        initial_continuation = arcparam.get(self.video_id,self.seektime)
+        initial_continuation = arcparam.getparam(self.video_id, self.seektime)
         await self._listen(initial_continuation)
    
     async def _listen(self, continuation):
@@ -159,7 +159,7 @@ class ReplayChatAsync:
                           prohibit from blocking by putting None into _pauser.
                         '''
                         self._pauser.put_nowait(None)
-                        #continuation= arcparam.get(self.video_id)
+                        #when replay, not reacquire continuation param
                     livechat_json = (await
                       self._get_livechat_json(continuation, session, headers)
                     )
diff --git a/pytchat/core_multithread/replaychat.py b/pytchat/core_multithread/replaychat.py
index 43b5e2e..10106ca 100644
--- a/pytchat/core_multithread/replaychat.py
+++ b/pytchat/core_multithread/replaychat.py
@@ -139,7 +139,7 @@ class ReplayChat:
     def _get_initial_continuation(self):
         ''' チャットデータ取得に必要な最初のcontinuationを取得する。'''
         try:    
-            initial_continuation = arcparam.get(self.video_id,self.seektime)
+            initial_continuation = arcparam.getparam(self.video_id,self.seektime)
         except ChatParseException as e:
             self.terminate()
             logger.debug(f"[{self.video_id}]Error:{str(e)}")
diff --git a/pytchat/paramgen/arcparam.py b/pytchat/paramgen/arcparam.py
index 6cc7650..45da2c7 100644
--- a/pytchat/paramgen/arcparam.py
+++ b/pytchat/paramgen/arcparam.py
@@ -65,7 +65,7 @@ def _tzparity(video_id,times):
     return ((times^t) % 2).to_bytes(1,'big')
 
 
-def get(video_id, seektime = 0, topchatonly = False):
+def _build(video_id, seektime, topchatonly = False):
     switch_01 = b'\x04' if topchatonly else b'\x01'
 
 
@@ -116,5 +116,11 @@ def get(video_id, seektime = 0, topchatonly = False):
                 ).decode()
             )
 
-
-
+def getparam(video_id, seektime = 0):
+    '''
+    Parameter
+    ---------
+    seektime : int
+        seconds to load past chat data
+    '''
+    return _build(video_id, seektime)
diff --git a/tests/test_arcparam.py b/tests/test_arcparam.py
index 926dd59..e53eda3 100644
--- a/tests/test_arcparam.py
+++ b/tests/test_arcparam.py
@@ -5,16 +5,16 @@ import requests, json
 from pytchat.paramgen import arcparam
 
 def test_arcparam_0(mocker):
-    param = arcparam.get("01234567890")
+    param = arcparam.getparam("01234567890")
     assert "op2w0wRyGjxDZzhhRFFvTE1ERXlNelExTmpjNE9UQWFFLXFvM2JrQkRRb0xNREV5TXpRMU5qYzRPVEFnQVElM0QlM0QoATAAOABAAEgEUhwIABAAGAAgACoOc3RhdGljY2hlY2tzdW1AAFgDYAFoAXIECAEQAXgA" == param
 
 
 def test_arcparam_1(mocker):
-    param = arcparam.get("01234567890", seektime = 100000)
+    param = arcparam.getparam("01234567890", seektime = 100000)
     assert "op2w0wR3GjxDZzhhRFFvTE1ERXlNelExTmpjNE9UQWFFLXFvM2JrQkRRb0xNREV5TXpRMU5qYzRPVEFnQVElM0QlM0QogNDbw_QCMAA4AEAASANSHAgAEAAYACAAKg5zdGF0aWNjaGVja3N1bUAAWANgAWgBcgQIARABeAA%3D" == param
 
 def test_arcparam_2(mocker):
-    param = arcparam.get("SsjCnHOk-Sk")
+    param = arcparam.getparam("SsjCnHOk-Sk")
     url=f"https://www.youtube.com/live_chat_replay/get_live_chat_replay?continuation={param}&pbj=1"
     resp = requests.Session().get(url,headers = config.headers)
     jsn = json.loads(resp.text)